Fan and fan assembly

ABSTRACT

A fan defines a plurality of fixing holes and includes a plurality of protrusions. The plurality of protrusions is located on sides of the plurality of fixing holes. Each protrusion includes a guiding surface. The plurality of guiding surface extends in the plurality of fixing holes. A fan assembly is also provided.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No.201510146970.7 filed on Mar. 31, 2015, the contents of which areincorporated by reference herein.

FIELD

The subject matter herein generally relates to a fan and a fan assembly.

BACKGROUND

When electronic devices are in a working state, microprocessors cangenerate heat. If the heat is not dissipated in time, the electronicdevices will be damaged.

BRIEF DESCRIPTION OF THE DRAWINGS

Implementations of the present technology will now be described, by wayof example only, with reference to the attached figures.

FIG. 1 is an isometric view of a first embodiment of a fan.

FIG. 2 is an assembly view of the fan of FIG. 1 being installed on acircuit board.

FIG. 3 is an isometric view of the fan of FIG. 1 being mounted to thecircuit board.

FIG. 4 is a top plan view of a second embodiment of a fan.

FIG. 5 is a top plan view of a third embodiment of a fan.

FIG. 6 is an isometric view of a forth embodiment of a fan.

DETAILED DESCRIPTION

It will be appreciated that for simplicity and clarity of illustration,where appropriate, reference numerals have been repeated among thedifferent figures to indicate corresponding or analogous elements. Inaddition, numerous specific details are set forth in order to provide athorough understanding of the embodiments described herein. However, itwill be understood by those of ordinary skill in the art that theembodiments described herein can be practiced without these specificdetails. In other instances, methods, procedures, and components havenot been described in detail so as not to obscure the related relevantfeature being described. Also, the description is not to be consideredas limiting the scope of the embodiments described herein. The drawingsare not necessarily to scale and the proportions of certain parts may beexaggerated to better illustrate details and features of the presentdisclosure.

Several definitions that apply throughout this disclosure will now bepresented.

The term “substantially” is defined to be essentially conforming to theparticular dimension, shape, or other feature that the term modifies,such that the component need not be exact. For example, “substantiallycylindrical” means that the object resembles a cylinder, but can haveone or more deviations from a true cylinder. The term “comprising” whenutilized, means “including, but not necessarily limited to”; itspecifically indicates open-ended inclusion or membership in theso-described combination, group, series and the like.

The present disclosure is described in relation to a fan

FIGS. 1-3 illustrate a first embodiment of a fan 10. The fan 10 is usedto dissipate heat from a component 24.

The fan 10 includes a bottom plane 11, and four protrusions 12. Fourfixing holes 14, an air inlet 16, and an air outlet 18 are defined inthe fan 10. The four protrusions 12 extend up from the bottom plane 11.The four fixing holes 14 and the air inlet 16 are defined on the bottomplane 11. The four protrusions 12 are located on sides of the fourfixing holes 14. Each protrusion 12 includes a guiding surface 120 and achamfer 122. The chamfer 122 extends from the guiding surface 120 intoan edge of the protrusion 12. The guiding surface 120 extends into thefixing hole 14. In one embodiment, the bottom plane 11 can besubstantially rectangular. The four protrusions 12 can be substantiallylocated on four corners of the bottom plane 11. The air inlet 16 isdefined in the centre of the bottom plane 11. The air outlet 18 isdefined in a sidewall of the fan 10. The sidewall can be substantiallyperpendicular to the bottom plane 11. In one embodiment, each protrusion12 can be substantially a half ring. The guiding surface 120 can bearc-shaped. A diameter of the guiding surface 120 is greater than adiameter of the fixing hole 14. The four guiding surfaces 120 curvetoward a same direction.

A circuit board 20 includes four fixing posts 22. The component 24 islocated on a central portion of the four fixing posts 22.

The fan 10 is moved to the circuit board 20 until the four fixing posts22 engaged with the four guiding surfaces 120. The four fixing posts 22are slid into the four fixing holes 14 guided by the four guidingsurfaces 120. The fan 10 is fixed to the circuit board 20. When thecomponent 24 is in a working state, heat produced by the component 24can be dissipated by the fan 10 via the air outlet 18.

FIG. 4 illustrates a second embodiment of a fan 10. The four protrusions12 can be substantially located on four corners of the bottom plane 11.The air inlet 16 is located on a centre of the bottom plane 11. Theguiding surface 120 can be arc-shaped. At least two arcuate directionsof the four guiding surfaces 120 are opposite.

FIG. 5 illustrates a third embodiment of a fan 10. The four protrusions12 can be substantially located on four corners of the bottom plane 11.The air inlet 16 is located on a centre of the bottom plane 11. Theguiding surface 120 can be arc-shaped. At least two guiding surfaces 120face each other.

FIG. 6 illustrates a forth embodiment of a fan 10. Each protrusion 12can be substantially a ring. The guiding surface 120 can be circular.

The embodiments shown and described above are only examples. Manydetails are often found in the art such as the other features of a fan.Therefore, many such details are neither shown nor described. Eventhough numerous characteristics and advantages of the present technologyhave been set forth in the foregoing description, together with detailsof the structure and function of the present disclosure, the disclosureis illustrative only, and changes may be made in the details, especiallyin matters of shape, size, and arrangement of the parts within theprinciples of the present disclosure, up to and including the fullextent established by the broad general meaning of the terms used in theclaims. It will therefore be appreciated that the embodiments describedabove may be modified within the scope of the claims.

What is claimed is:
 1. A fan comprising: a plurality of fixing holes; aplurality of protrusions located on sides of the plurality of fixingholes, each of the plurality of protrusions comprising a guidingsurface; and wherein the plurality of guiding surfaces extends into theplurality of fixing holes.
 2. The fan of claim 1, wherein eachprotrusion is substantially a half ring, and the guiding surface isarc-shaped.
 3. The fan of claim 2, wherein the plurality of guidingsurfaces curve toward a same direction.
 4. The fan of claim 2, furthercomprising a bottom plane, wherein the plurality of protrusions issubstantially located on four corners of the bottom plane, and theplurality of guiding surfaces face to each other.
 5. The fan of claim 2,further comprising a bottom plane, wherein the plurality of protrusionsis substantially located on four corners of the bottom plane, andarcuate directions of the plurality of guiding surfaces are opposite. 6.The fan of claim 1, wherein each protrusion is a ring, and each guidingsurface is substantially circular.
 7. The fan of claim 1, wherein eachprotrusion comprises a chamfer, and the chamfer extends from the guidingsurface into an edge of the protrusion.
 8. A fan assembly comprising: afan comprising a plurality of protrusions and defining a plurality offixing holes; and a circuit board comprising a plurality of fixingposts; wherein the plurality of protrusions is located on sides of theplurality of fixing holes, each protrusion comprising a guiding surface,the plurality of guiding surfaces extends into the plurality of fixingholes, and the plurality of fixing posts are slid into the plurality offixing holes guided by the plurality of guiding surfaces.
 9. The fanassembly of claim 8, wherein the circuit board further comprises acomponent, and the component is located on a central portion of theplurality of fixing posts.
 10. The fan assembly of claim 8, wherein eachprotrusion is substantially a half ring, and the guiding surface isarc-shaped.
 11. The fan assembly of claim 10, wherein the plurality ofguiding surfaces toward a same direction.
 12. The fan assembly of claim10, further comprising a bottom plane, wherein the plurality ofprotrusions is substantially located on four corners of the bottomplane, and the plurality of guiding surfaces curve toward a centre ofthe bottom plane.
 13. The fan assembly of claim 10, further comprising abottom plane, wherein the plurality of protrusions is substantiallylocated on four corners of the bottom plane, and arcuate directions ofthe plurality of guiding surfaces are opposite.
 14. The fan assembly ofclaim 8, wherein each protrusion is a ring, and each guiding surface issubstantially circular.
 15. The fan assembly of claim 8, wherein eachprotrusion comprises a chamfer, and the chamfer extends from the guidingsurface into an edge of the protrusion.